title

Think smart.

$x$ is always negative.

$y$ can be negative or positive, but $y^2$ will always be positive.

So, if I multiply a negative and a positive $(xy^2)$, I'll have a negative number.

Hence, I can keep $y=0$, get the product to 0 (which is greater than a negative number).

This feels like a common GMAT question (based on the trick applied).

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Point out the exact step you're stuck on and let us know what you've already tried. This helps others understand your thinking and guide you better.